//Copyright (c) Microsoft Corporation. All rights reserved.
//Licensed under the MIT License.

// This sample uses the Apache HTTP client library(org.apache.httpcomponents:httpclient:4.2.4)
// and the org.json library (org.json:json:20170516). You can download these from Maven repo into lib directory of your project.

import java.net.URI;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONObject;

public class Main
{
    // **********************************************
    // *** Update or verify the following values. ***
    // **********************************************

    // Replace the subscriptionKey string value with your valid subscription key.
    public static final String subscriptionKey = "Enter key here";

    // Replace or verify the region.
    //
    // You must use the same region in your REST API call as you used to obtain your subscription keys.
    // For example, if you obtained your subscription keys from the westus region, replace
    // "westcentralus" in the URI below with "westus".
    //
    // NOTE: Free trial subscription keys are generated in the westcentralus region, so if you are using
    // a free trial subscription key, you should not need to change this region.
    public static final String uriBase = "https://westcentralus.api.cognitive.microsoft.com/vision/v1.0/analyze";


    public static void main(String[] args)
    {
        HttpClient httpclient = new DefaultHttpClient();

        try
        {
            URIBuilder builder = new URIBuilder(uriBase);

            // Request parameters. All of them are optional.
            builder.setParameter("visualFeatures", "Categories,Description,Color");
            builder.setParameter("language", "en");

            // Prepare the URI for the REST API call.
            URI uri = builder.build();
            HttpPost request = new HttpPost(uri);

            // Request headers.
            request.setHeader("Content-Type", "application/json");
            request.setHeader("Ocp-Apim-Subscription-Key", subscriptionKey);

            // Request body.
            StringEntity reqEntity = new StringEntity("{\"url\":\"https://upload.wikimedia.org/wikipedia/commons/1/12/Broadway_and_Times_Square_by_night.jpg\"}");
            request.setEntity(reqEntity);

            // Execute the REST API call and get the response entity.
            HttpResponse response = httpclient.execute(request);
            HttpEntity entity = response.getEntity();

            if (entity != null)
            {
                // Format and display the JSON response.
                String jsonString = EntityUtils.toString(entity);
                JSONObject json = new JSONObject(jsonString);
                System.out.println("REST Response:\n");
                System.out.println(json.toString(2));
            }
        }
        catch (Exception e)
        {
            // Display error message.
            System.out.println(e.getMessage());
        }
    }
}